Terminal for telephone receivers



Jan. 12 1926. 1,569,776

D. H. Moss TERMINAL FOR TELEPHONE RECEIVERS Filed Feb. 27, 1925 F 5- 5 INVENTOR.

0/; W0 H. M055 A TTORNEY.

tated by the provision of terminal v Patented Jan. 12, 1926.

UNITED STATES PATENTOFFICE.

DAVID I-I. MOSS, or NEWARK, NEW Jnzasnv, ASSIGNOR, BY

INCL, or NEWARK, NEW'J'ERSEY, A cozaroaa'rron TO BRANDES LABORATORIES, OF NEW TERMINAL FOR 'I'ELEPHGNE RECEIVERS.

innsmz: ASSIGNMENTS,

Application filed February 27, 1925. Serial No. 12,148.

To all 'whom it may concern:

Be it known that I, DAVID H. Moss, a citizen of the United States, residing at Newark, in the county of Essex and State of New Jersey, have invented a certain new and useful Improvement in Terminals for Telephone Receivers, of which the following is a specification.

My invention relates broadlyto telephone headsets and more particularly to a construction of terminal post for telephone receivers.

One of the objects of my invention is .to provide a construction of telephone receiver having parts arranged in such manner that the receiver is capable of manufacture on a quantity production basis at relatively low cost.

Another object of my invention is to provide a construction of telephone-receiver in which the assembly of the parts is faciliposts having soldering heads pro'ecting inter orly of the telephone receiver with binding posts formed integrally therewith and pro ecting from the rear of the telephone receiver casgtill another object of my invention is to provide a terminal post which may be rigidly secured in the rear of a telephone receiv-.

erv casing with-means for substantially insulating the terminal post from the parts of the telephone receiver mechanism with a lug member projecting from the terminal post interiorly of the receiver to facilitate the soldering of the extremities of the magnet windings to the terminal post during the assembly process.

My invention willbe more clearly understood from the following specification by reference to the accompanying drawings, in which:

Figure 1 is of a telephone atin parts Fig. 2 sh a plan view of the interior receiver casing with the operpartially assembled therein; owe a cross sectional view of a telephone receiver casing with the terminal posts of my invention secured in the rear of the casing and arranged with the soldering heads mounted adjacent the magnet system for the securing of the magnet windings thereto; Fig. 3 illustrates the several arts which make up the terminal posts 0 the telephone receiver comprising my in tion; Fig. is a perspective view of the telephone receiver terminal post; Fig. 5 is an enlarged fragmentary plan view showing the relation of the soldering head of the terminal post to one of the electromagnets within the receiver; and Fig. 6 is a fragmentary cross sectional View illustrating the method of rigidly securing the terminal posts within the telephone receiver casing.

Heretofore in the art tele hone receivers have had their magnet win ings connected to binding postsof ordinary design and which have not been particularly adapted for assembly of the telephone receiver and connection of the magnet windings within the small available space of the telephone receiver casing. -A terminal block has often been employed within the telephone receivfor the reason that it tends to destroy or greatly impair the. adjustment of the telephone receiver. By in construction of terminal post I avoid t moving the cap from the and permit connections to be made from the exterior of the telephone receiver without disturbing the original adjustment of the receiver. The terminal post construction of m invention greatly facilitates the securing of the binding posts in the rear of the telephone receiver casing and at the same time facilitates the assembly of the telephone receiver by ermitting the magnet windings to be readi y soldered to the bmding post terminals as will be hereinafter more fully explained. 4 v

Referrin more particularly to the drawings, the to ephone receiver casing has been indicated by reference character 1. The ma etic angles on which the electromagnetic bbins 4 and 5 are wound are repre' telephone receiver and 7. The laterally extending portions 2 and 3 are a ertured at 11, which a ertures register with apertures 10, -forme 1n the telephone receiver casing. The terminal post forms a unitary means by which themagnetic angles are rigidly secured within the telephone receiver casing 1n proper position and at the same time the binding post rigidly secured with relation to the rear of the telephone receiver casing, the post being substantially insulated from the parts of the telephone receiver mechanism. The

binding post comprises an extended shank 12 having an enlarged portion 14 adjacent one end with an extension 9 forming a solderin head projecting large portion 14 may be so shaped at 1ts periphery as to facilitate the gripping of the post and the insertion of the post w1th1n the telephone receiver casing, during the assembly process. The soldering head 9, which extends from the enlarged portion 14, has a diameter substantially less than the diameter of the shank 12 and projectsupwardly, being formed with a substantial y conically shaped head as has been indicated. The enlarged ortion 14 does not have both its upper sur ace and lower surface-parallel, but the lower surface is cut at a substantial angle to the axis of the terminal post forming a beveled under head with a surface 15 angularly disposed at substantially 60 degrees with res ect to the axis'of the terminal post 12. The purpose of the angular disposition of the surface 15 is to enable the binding post to be drawn rigidly against and thereby deform an insulated gasket 8 which is substantially out of round at its periphery enabling it to be readily gri ped and slipped over the shank 12 during 516 assembly process. The shank 12 passes. through an insulated sleeve 17 disposed in the aperture 10 in the rear wall of the tele hone receiver casing. An insulated gas et 18 is positioned a ainst the outside surface of the rear wall 0 the telephone receivercasing 1 and the threaded portion 16 of the shank 12 passes through this gasket permitting nut 19 to be screwed rigidly against gasket 18 drawing the enlarged portion 14 against the insulated gasket 8. The enlarge portion 14 is so shaped at its periphery that a plurality of biti teeth 20 are formed thereon, which tee tfi bite into the material of gasket 8 thereby rigidly securing the terminal post within the telephone receiver casing. In the assembly process the conductors 21 extendin from the magnet bobbins are readily move against the soldering head 9, flux, solder and heat applied thereto, and a rigid connection secured. The time necessary in making this connection is considerably retherefrom. The enduced over the time operation heretofore necessary in telephone receiver constructions previously known in the art.

It will be appreciated that the construction of my terminal post greatly facilitates manufacture of telephone receivers on a basis of many thousands per day. In large production programs of this kind individual operators are assigned a particular duty andmy terminal post has been designed after. a careful study of time operations normally encountered in telephone receiver manufacture. By the construction herein described I have succeeded in both reducing the time required in the assembly of the tele hone receiver and in producing a more desirable product.

While I have described my invention in certain particular embodiments, I desire that it be understood that modifications may be made and that I intend no limitations upon the invention other than those imposed by the scope of the appended claims.

What I claim and desire to secure b Letters Patent of United States is as f0 lows:

1. An electromagnetic sound reproducer, comprising in combination a casing, an electromagnetic operating mechanism carried within said casin a pair of terminal posts projecting throug the rear wall of said casing for mechanica ly securing said electromagnetic operating mechanism in position and electrically completing connections between said electromagnetic o erating mechanism and the exterior. of sai casing, said terminal posts comprising screwthreaded shanks having enlarged 1rre arly shaped heads adjacent one end t ereof with soldering heads extending from said irregularly shaped heads and extending into said casing, insulating means concentrically disposed upon sa1d screw threaded shanks and substantially separating the surfaces of said casing from said terminal posts, and teeth formed on said enlarged heads for distorting the shape of said insulating means whereby said terminal posts are rigidly secured in position with respect to said casing.

2. In an electromagnetic sound re roducer, the combination with a casing 0 an electromagnetic sound operating mechanism carried within said casing and terminal posts arranged to secure said electromagnetic sound operating mechanism within said casing, sa1d terminal osts each comprising screw threaded sha s, enlarged under-cut heads adjacent one end thereof and soldering heads extending from said enlarged heads interiorly of saidcasing, said terminal posts being insulatingly sup orted with respect to the lower wall of sa1d casing with said under-cut enlarged heads serving to prevent rotation of said terminal posts with respect to said casing when said posts are secured in position.

A terminal post for electromagnetic sound reproducers comprising in combination with a casing, a screw threaded shank,

an enlarged head adjacent one end thereof,-

a soldering head extending from said enlarged head, said enlarged head having anunder-cut surface disposed at an angle to 10 the axis of said shank, forming teeth at the outer periphery of said enlarged head for engaging insulating material concentrically disposed upon said shank and adjacent opposite sides of the walls of said casi whereby said terminal posts may be rigidly secured in position by engaging said enlariged head against said insulating materia DAVID H. Moss. 

